Water-circulating system.



H. M. ADAMS. I WATER CIRCULATING SYSTEM.

APPLICATION FILED MAR. 6, 1916. 120,789.

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WATER CIRCULATJNG SYSTEM.

APPLICATION FILED MAR. 6. I916.

2 SHEETS-SHEET 2.

izveznior Patented Dc. 5,1916.

HERBERT M. ADAMS, OF PAWTUGKFT, RHODE. ISLAND.

wATEn-c Ro rmG SYSTEM.

necessa- Specification of Letters Patent.

Patented Dec. 5, 1916.

Application filed March 6, 1916. Serial No. 82,316.

The essential objectsof my invention are. to combine in a single water circulating sys tem a main heater, such as a boiler, an auxiliary heater, such as an instantaneous'heater, and a hot water tank; to insure against the operation of the relatively more expensive secondary heater so long as an amply high temperature is maintained in the system by the main heater; and to insure this result automatically; to provide a novel means for automatically directing the flow of the water through whichever of a plurality of circuits the circumstances demand; to build up the circulation by utilizing and continuing in circulation the heat already generated and thus avoid the expense and delay involved ininitially completely heating the water adjacent a faucet each time the auxiliary heater is operated; to enable a diminished size of; auxiliary heater'tobe employed, thereby reducing the cost of installation and maintenance; and to effect these ends in a simple and inexpensive structure readily adaptable to incorporation into various existing heating plants.

To the above ends essentially my invention 'consists in such parts and combinations of parts as fall within thescope of the appended claims. I

'In the accompanying drawings which show the embodiment of my invention in its preferred form, Figure 1 is a front elevation of the novel system, Fig. 2, a diagrammatic elevation of the auxi iary or instan: taneous heater, Fig. 3; a section on line 3-3 of Fig. 1, Fig. 4, a plan view of the bottle,

and Fig. 5, a section on line 55 of Fig. 3.

Like reference characters indicate like parts throughout the views.

In the embodiment of my invention herein shown the primary heater is a furnace boiler 6 provided, with a bottle 8. The form and location of the bottle is not essential, but superior results are attained by one comprising parallel horizontal tubes IOopenmg into vends by a tube 12.

f the boiler 6 and connected at their outer Branching from the tubes 10 at right angles thereto are tubes 14 connected at their ends by tubes 16 and 17 respectively. The described tubes receive the hot water from the boiler and are preferably jacketed with asbestos or otherwise to prevent dissipation of the heat from the water within the tubes. The vertical tubes of the "bottle may number one or more, and

each has passing longitudinally thereof and projecting through openings 18 in its end a water pipe of less external diameter than the internal diameter of the inclosing tube, so that there is an area of hot water 19 surrounding the pipe. These pipes 20, 21, and- 22 pass through the tubes 12, 16, and 17 respectively. The upper projecting ends of the water pipes are horizontally disposed and converge at ajoint 24; while their lower projecting ends converge in a connection 25.

Adjacent the boiler is a water tank 27 which receives cold water through a pipe 28 entering its top. A water pipe 29 leads from the bottom of the tank to the connection 25; and a pipe 30 extends from the top of the tank and has a branch 31 extending to the connection 24. The pipe 30 leads to a terminal of the heating coil 34 of any, usual preferred instantaneous heater 35. 36' is the automatic water valve thereof, and 38 is the thermostat placed in circuit with the heating coil which operates, through the usual thermal actuating mechanism 39, the valve 41 in the gas supply pipe 43 which controls the burner 44 ignitible by pilot burner 46. Extending from the hot water or discharge terminal of the coil 34 is a vertical pipe 48 and horizontal pipe 49 leading to a connection 50 in which is a faucet 51 orother delivery device. From this connectionextends horizontally a pipe 53 connected with a downwardly directed pipe 54 which enters an intermediate portion of the hot water tank 27. In the pipe 54 is an upright inverted check valve 56. Between the faucet and heater the pipes 30 and 49 are connected bya pipe 58 of less diameter than the connected pipes, constituting a by pass. a

The operation of .my system when the faucet is closed is as follows: The water supply initially enters the tank 27 through the pipe 28, and passes from the tank the boiler 6 in the tubes surrounding said pipes, raises the temperature of the Water in the latter. The flow of liquid from the tank to the point of discharge, when liquid is being drawn from the system, is through the pipe to the by-pass 58, then part through the by-pass 58 and part through the pipes 30.,and 48 to the pipe 49 andfaucet downwardly directed check valve 56 operates to prevent the water being siphoned from the hot water tank through pipes 54 and 53. The circulation keeps the temperature of all the pipes of the system relatively high at all times thus lessening the work and consequent expense of the auxiliary heater.

What is claimed as new is 1. In a water circulating system, a main heater, an auxiliary-heater connected therewith, a hot water tank, a connection between the upper end of the tank and the auxiliary heater, a connection between the lower portion of the tank and the auxiliary heater, a

by-pass of reduced area between said con nections, tubes connected with theheater, and pipes extended through said tubes and connected with the tank at the top and bottom thereof.

2. In a water circulating system, a main heater, an auxiliary heater connected therewith, a hot water tank, a connection between the upper end of the tank and the auxiliary heater, a connection between the lower portion of the tank and the auxiliary heater, a by-pass of reduced area between said con manner, and the nections, tubes connected with the main heater, pipes extended through said tubes and connected with the tank at the top and bottom thereof, and means in one of said connections between the tank and the auxiliary heater for withdrawing the water without its traversing the by-pass.

3. In a hot" water circulating system, a main heater, an auxiliary heater, a hot water tank, two independent connections between said "tank and auxiliary heater, a

bottle embodying tubes in direct communication with each other and with themain heater,- water circulating pipes extended through said tubes and connected with oppo- 1 site ends of said tank, and a by-pass of reduced area between the two connections between the tank and auxiliary heater.

4; In a hot water circulating system, a

main heater, an auxiliary heater, a hot wa-' ter tank, two independent connections. be-

tween said tank and auxiliary heater, a bottle embodying tubes in direct communication with each other and with the main heater, water circulating pipes extended through said tubes and connected with opposite ends of said tank, a bypass of re-- ducedarea between the two connections between the tank and auxiliary heater, and a spigot in one of said connections.

5. In a hot water circulating system, a.

main heater, an auxiliary heater, a hot water tank, two independent connections between said tank and auxiliary heater, a bottle embodying tubes in direct communication with each other and with the main heater,w water circulating pipes extended through said tubes and connected with opposit'e ends of said tank, a .by-pass of reduced area between the two connections between the tank and auxiliary heater, a

spigot in one ofsaid connections, and. a check valve 1n sald connection between said spigot and the tank.

In testimony whereof I have affixed my signature. ERBERT M. ADAMS. 

